Brake-operating- mechahism



H. JOSEPHSON.

BRAKE OPERATING MECHANISM.-

APPLICATION FILED JUNE 25. I917.

1,3 1 R593. Patented Sept. 30, 1919,

2 SHEETSSHEET l.

W/ii'vesses. V fmvenv m.

H. JOSEPHSON.

BRAKE OPERATING MECHANISM. APPLICATION FILED .IUNE 25, i917.

1317,5080 Patented Sept. 30, 1919.

2 SHEETS-SHEET 2.

UNTED sraras araar orrcn HENRY JOSEPHSON, OF CLEVELAND, OHIO.

BEAM-OPERATING MECHANISM.

T 0 all whom it may concern:

Be it known that I, HENRY JOSEPHSON, a citizen of the United States of America, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Brake- Operating Mechanism; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in brake-operating mechanism for automobiles or motor-vehicles.

One object of this invention is not only to provide brake-operating mechanism of the character indicated comprising means for effecting the actuation of one brake-shoe into its braking position during the actuation of another brake-shoe into its braking position, but to provide wholly independent means for eii'ecting the actuation of one of said brake shoes into its braking position and to avoid disturbance of or interference with said independent means during the actuation of both brake-shoes simultaneously into their braking position.

Another object'is to render one brake-shoe capable of being actuated into its braking position by means adapted to be operated to actuate said brakeshoe into said position by and during the operation of mechanism 0peratively connected with another brake-shoe, so that both of said brake-shoes are actuated into their braking position by the requisite operation of said mechanism, and to avoid disturbance or interference with other means for actuating one of said brake-shoes into its braking position independently of said mechanism.

Another object is not only to provide brakeshoeactuating means for effecting movement of one brake-shoe into its braking position independently of mechanism for effecting the actuation of another brake-shoe into its braking position, but to provide such an operative connection between said mechanism and the brake-shoe first-mentioned in this paragraph that both brake-shoes are actuated into their braking position during the requisite operation of said mechanism without disturbing or interfering with said mechanism during the operation of the l)rake-shoe-actuating means first-mentioned in this paragraph.

Another object is not only to provide a Specification of Letters Patent. Pmtgentigdggpt, 3t), 1e19,

Application filed June 25, 1917.

Serial No. 176,687.

brake-drum connected to and rotatable with a rotary member for which brake-mechanism is to be provided and to have two brake-shoes normally loose relative to and shiftable into braking engagement with the drum, but to provide independent means for actuating one brake-shoe into braking engagement with the drum and other means for actuating said brake-shoe into braking engagement with the drum during the operation of mechanism for effecting the actuation of the other brake-shoe into braking engagement with the drum.

Another object is to render my improved brake-operat1ng mechanism simple in" construction and reliable in its operation.

With these objects in view, and to attain any other object hereinafter appearing. this invention consists in certain. features of construction, and combinations and relative arrangement of parts, hereinafter described in this specification, pointed out in the claims, and illustrated in the accompanying drawings.

In said drawings, Figure 1 is a top plan illustrating brakeoperating mechanism embodying my invention. Fig. 2 is a vertical section taken along the line 2-2, Fig. 1. Fig. 3 shows a portion of Fig. 2, but in Fig. 2 both illustrated brake-shoes are shown in their normal and non -braking position, whereas in Fig. 3 said brake-shoes are shown in their braking position. Fig. 4 is a view corresponding with Fig. 3, except that in Fig. 4 only one of the brake-shoes is shown in its braking position. Fig. 5 isa vertical section taken along the line 5-5, Fig. 2. Fig. 6 is a sectional'view in detail.

Referring to said drawings, A indicates a suitably operated rotatable rear axle-section of an automobile or motor-vehicle, and (1 indicates the hub of a wheel operatively connected with said axle-section. A casing B, which is rigid with the transmission-case C of the automobile, surrounds the said axlesection, and a brake-drum, arranged adjacent the inner end of the hub a and secured in any approved manner to said hub, has its annular brake-member 7 arranged in the usual manner concentrically relative to said hub and the connected axle-section. The casing B is provided, at the inner end of the brake-drum, with two arms 8 and 9 projecting forwardly and rearwardly respectively.

D indicates the inner brake-shoe which is arranged internally of the annular brake member 7 of the brake-drum and held from rotating by a stud 10 rigid with the rearwardly projecting arm 9 of the axle-casing. Said brakeshoe is normally in suitable proximity and. loose relative to the internal surface of the annular brake-member 7 of the brake-drum and adapted to be actuated into braking engagement with said member of the drum. It will be observed therefore that said brake-shoe is normally in its non-braking posit-ion. Said brake-shoe extends circumferentially of the axle-section A nearly but not entirely around said axle-section and therefore has its terminal ends suitably spaced circumfere'ntially of the brake-drum. Preferably said ends of said brake-shoe are arranged adjacent the forward side of the drum. A horizontally arranged brake-operating rock-shaft E, which is substantially parallel with and forward of said axle-section, is supported in any approved manner, as, for instance, from the transmission-case C and from the forwardly extending arm 8 of said axle-casing. Said shaft extends between the terminal ends of the brake-shoe D and is provided with two cams 12 arranged at opposite sides respectively of the shaft and adapted to engage and farther separate said ends of said brake-shoe during the rotation of the shaft the extent required and thereby actuate said brake-shoe into its braking position, shown in Fig. 4, against the action of a suitably applied spiral spring d, and cause said brake-shoe to clampingly engage the internal surface of the brake-mem her 7 of the brake-drum. The spring (Z extends between and is suitably attached to opposite end-portions of the brake-shoe D. The cam-shaft E has an upwardly'extending arm 13. operatively connected at its upper end with a rod e extending forwardly from said arm and adapted to be operated .by a lever not shown. Preferably, as shown in Fig. 1, a suitably applied spring, such, for instance, as the spring E coiled around the cam-shaft and attached at one end to said shaft and at its opposite end to the transmission-case C, is provided, and said shaft is adapted to make its braking movement against the action of said spring, and said spring acts to retain, in a normal position, the hereinbefore described means em-.

ployed invactuating the brake-shoe D into its braking position.

I would here remark that the brake-shoe D is generally referred to as the emergency brake, and obviously said cam-shaft and the connected rod 6 for rotating said shaft constitute means for operating said shaft independently of any means employed in the operation of the outer brake-shoe G which is-arranged externally and extends circumferentially 'of the brake-member 7 of the brake-drum and is normally loose relative to and adapted to be actuated into braking enshoe.

connected with a foot-lever not shown.

ends arranged adjacent the forward side of the drum and suitably spaced circumferentially of the drum. A lever H is arranged forward of the terminal ends of the outer brake-shoe G and fulcrumed or pivoted, as at h, to the lower end of an upright rod I which extends from said lever upwardly and loosely through a slot 15 in the outward enlargement 16 of the upper terminal end of said brake-shoe. The rod 1 is spaced forwardly from said outer brake-shoe and provided at its upper end with a head 17 resting on said enlargement of said brake-shoe, as shown in Figs. 1 and l. The lever H extends rearwardly and forwardly of the lower end of the rod I and is attached rearwardly of said rod in any approved manner to the lower terminal end of the outer brake- Forward of said rod the lever H extends upwardly above the upper terminal end of said outer brake-shoe. Said rod is provided, intermediately of the enlargement 16 of the upper terminal end of the outer brake-shoe G and the lower end of the rod, with an upwardly facing shoulder 18. A spiral spring 1 is coiled around said rod and confined between said shoulder and the said enlargement of said outer brake-shoe and acts to retain the terminal ends of said render said brake-shoe loose relative to the brake-drum.

Intermediately of the cam-shaft E and the axle-casing B is arranged a brake-operating rock-shaft L which is substantially horizontal and substantially parallel with the cam-shaft and shown extending between and supported from the transmission-case C and the forwardly extending arm 8 of the axle-casing. The shaft L is shown arranged nearer the cam-shaft E than to the axle-casing. The shaft L is operatively provided with an upwardly projecting arm 20'operatively connected at. its upper end, by a link 21, with the lever H at the upper end of said lever H. The shaft L is operatively provided with another upwardly extending arm 22 which is shown operatively connected at its upper end with an endwise shiftable rod Z extending forwardly from said lastmentioned arm and preferably operatively I would here remark that the outer brakeshoe G is generally referred to as the foot and its arms 20 and 22, the link 21, the lever H and the rod I constitute mechanism for actuating said outer brake-shoe into braking engagement with the brake-member 7 of the brake-drum against the action of the spring g. The relative arrangement of the parts is such that forward endwise movement of the rod 1 results in the rotation of the shaft L in the direction required to effect its braking movement,that is, in the direction required to cause the operative connection between the arm 20 of said shaft and the terminal ends of the outer brakeshoe to draw said ends of said brake-shoe toward each other and thereby actuate said brake-shoe into its braking position, shown in Fig. 3, and cause said brake-shoe to clampingly engage the outer circumferential surface of the brake-member 7 of the brake-drum. Preferably, as shown in Fig. 1, a suitably applied spring, such, for instance, as the spring L coiled around the rock-shaft L and attached at one end to said shaft and at its opposite end to the transmission-case C, is provided, and said shaft is adapted to make its braking movement against the: action of said spring, and said spring acts to retain the hereinbefore described mechanism for actuating the outer brake-shoe G into its braking position in its normal position.

Adjacent the terminal ends of the inner brake-shoe D and internally of the'brake drum is. a toggle-joint which has one link 23 thereof attached to the upper terminal end of said brake-shoe and has its other link 24 attached to the lower terminal end of said brake-shoe, and said toggle-joint is operatively connected at its knuckle or knee, by alink 25, with an upwardly rojecting arm 26 of a brake-operating roc -sh'aft M which is supported in any approved manner, as, for instance, from the forwardly projecting arm 8 of the axle-casing and arranged intermediately of the intermediate shaft L and. the axle-section A. The rearward shaft M is substantially horizontal and substantially parallel with said axle-' section and with the shafts E and L and operatively provided in proximity to the inner end-portion of the forwardly extending arm 8 of the axle-casing with an upwardly projecting arm 27 which is provided at its upper end with a laterally projecting pin 28 which engages a slot 29 formed in and extending laterally through and longitudinally of a link m which is pivotally connected at its forward end to the arm 20 of the intermediate shaft L. In the normal position of the parts the pin 28 is arranged next the forwardly facing rear end wall of the slot 29, as shown more clearly in Fig. 6 which is drawn on a larger scale than the other figures of drawings and is a horizontal section taken along a line centrally through said pin and showing only the pincarrying portion of the arm 27 and the adj acent portion of the link m. It will be observed therefore that during endwise movement of the rod 1 forwardly as required to effect the braking movement of the intermediate shaft L ashereinbefore indicated, and thereby result in the actuation of the outer brake-shoe G into brakinig engagement with the brake-drum, the rear end wall of the slot 29 actuates the pin 28 and connected shaft-arm 27 forwardly and thereby effects the braking movement of the rearward shaft M and results, through the medium of the arm 26 of said shaft, the link 25 and the connected toggle-joint, in the actuation of the inner brake-shoe D into braking engagement with the brake-drum. Preferably, as shown in Figs. 1 and 2, 'a spiral spring M shown attached at one end to the arm 26 of said shaft and at its opposite end to the forwardly extending arm 8 of the axle-casing, is provided, and said shaft is adapted to make its braking movement against the action of said spring, and said spring acts to retain, in a normal position, the operative connection between the inner brake-shoeD and the mechanism employed for actuating the outer brake-shoe Gr into. its braking position. The slot 29 in the link 25 has such length that the toggle-joint and connected link 25 and shaft M have idle motion during the actuation of the inner brakeshoe into its braking position by the operation of the cam-shaft E, and therefore the movement of the toggle-joint occurring dur ing the braking movement of'said cam-shaft does not disturb the mechanism employed in effecting the braking. movement of the intermediate shaft L and does not disturb the outer brake-shoe. It will be observed also that the rotation of the intermediate shaft L in the direction required to efi'ect its braking movement as required to shift the outer brake-shoe into its braking positiondoes not disturb or interfere with the cam-shaft E or means employed in actuating the inner brake-shoe into its braking position independently of the operation of the outer brake-shoe. Also, it will be observed that the actuation of the outer brake-shoe into its braking position results in the rotation of the rearward shaft M in the direction requiredto actuate the inner brake-shoe into its braking position without disturbing or interfering with the cam-shaft or independent means for actuating said inner brakeshoe into its braking position.

By the construction hereinbe'fore described it will be observed that my improved brake-operating means comprises one mechanism (the toggle-arms 23 and 24, the link 25 and the shaft M and its arms 26 and 27) for actuating the inner brake-shoe D, into its braking position, and another mechanism (therod e and the cam-shaft E and its arm 13) for actuating said brake-shoe into said position, and that each of said mechanisms has all of its component members independent of the other of said mechanisms and that therefore said mechanisms are wholly independent of each other, so that any breakage or mutilation of or injury to any component member or portion of one of, said mechanisms does not interfere with the operation of the other of said mechanisms, It will also be observed that the operative connection between the mechanism for actuating the outer brake-shoe G into its braking position and the mechanism comprising the toggle-arms 23 and 24 is formed by the pin 28 of the arm 27 of the shaft M and the slotted link m connected to and movable with the arm 20 of the shaft L, that by the hereinbefore described relative arrangement of said link and said pin said toggle-arms move with the rod 1 and thereby actuate the inner brake-shoe into its braking position during the actuation of said rod endwise in the direction required to actuate the outer brakeshoe into its braking position, and that the mechanism comprising said toggle-arms. al-

though operatively connected with the aforesaid mechanism for actuating the outer brake-shoe into its braking position, has idle motion during the actuation of the inner brake-shoe into its braking position by the required endwise movement of the rod 6.

. What I claim is 1. The combination, with two brake-shoes normally in their non-braking position, of two mechanisms operatively connected with one of said brake-shoes, and mechanism capable of operation to actuate the other of said brake-shoes intoits braking position and comprising a movable rod the actuation whereof endwise in one direction is adapted to effect said operation of the last-mentioned mechanism, one of the first-mentioned mechanisms being operatively connected with said rod during said actuation of said rod and having idle motion during the operation of the other of said first-mentioned mechanisms independently of said rod, and each of said first-mentioned mechanisms having its component members independent of the other of said mechanisms. 1

2. The combination, with a. brake-shoe normally in its non-braking position, and another brake-shoe normally in its non-brakrod the actuation whereof endwise in one di rection is adapted to effect said operation of the last-mentioned mechanism, and an operative connection between said last-mentioned mechanism and the aforesaid togglearms, said tog le-arms being movable with the lfirst-mentioned brake-shoe and inde pendently of said rod during the actuation of said first-mentioned brake-shoe into its braking position by the first-mentioned mechanism.

3. The combmation, with a brake-shoe normally in its non-braking position, and

another brake-shoe normally in its non-brakAv ing position, of mechanism capable of operation to actuate the first-mentioned brake shoe into its braking position and comprising a movable rod the actuation whereof endwise in one direction is adapted to effect said operation of said mechanism, other mechanism which is independent of the firstmentioned mechanism and comprises togglearms operatively connected with said firstmentioned brake-shoe, mechanism capable of operation to actuate the second-mentioned brake brake-shoe into its braking position and comp-rising a movable rod the actuation whereof endwise in one direction is adapted to effect said operation of the last-mentioned mechanism, and an operative connection between said last-mentioned mechanism and the aforesaid toggle-arms, said toggle-arms being movable with the first-mentioned brake-shoe and independently of the secondmentioned rod during the actuation of said first-mentioned brake-shoe into its braking position by the aforesaid actuation of the first-mentioned rod.

In testimony whereof, I sign the foregoing specification, in the presence of two witnoses. 

